This main-dish recipe is fork-tender after slow cooking all day. Red wine broth gently flavors the chuck steak, green beans, and mushrooms.
Heat oil in a large nonstick skillet over medium-high heat. Add steak to skillet and cook 5 minutes, stirring occasionally, until browned. Remove with a slotted spoon to slow cooker bowl.
Add mushrooms and garlic to skillet and sprinkle with 1/4 teaspoon each salt and pepper. Cook, stirring occasionally, 5 minutes. Stir in tomato paste and cook, stirring, 2 minutes. Add flour and cook, stirring constantly, 1 minute.
Scrape contents of skillet into slow cooker bowl with beef. Stir in onions, broth, red wine and 1/2 teaspoon of the thyme. Cover and cook on HIGH for 5 hours or LOW for 7 hours.
Remove lid and stir in remaining 1/4 teaspoon each salt and pepper, 1/4 teaspoon dried thyme and green beans. Cover and cook an additional 30 minutes. Serve on top of egg noodles, if desired.